The tiger claws are coming out! Charlie Sheen took a jab at Ashton Kutcher -- his replacement on CBS' hit sitcom Two and a Half Men -- on Monday, Jan. 6 via Twitter. "Hey Ashton," wrote the Anger Management star. "Sorry bro all good now quit barfing on my old brilliant show."

48-year-old Sheen continued, "Remember Punk'd? how duz it feel?" (Punk'd was a hidden-camera, prank show that aired on MTV from 2003-2012, which Kutcher, 35, created, produced and hosted.)

The unpredictable actor's insult followed an initial tweet just one day before, where he gave a warm shout-out to his former Two and a Half Men colleague, Jon Cryer. "Hey Jon!!! u r a GENIUS!!! I effin love and MISS YOU old pal!" said the social media-happy star. His tweet was a drastic improvement from 2011, when Sheen called Cryer a "troll" and a "traitor" in an interview.

He completed his tweet Sunday with a jab at Kutcher and wrote, "Q; who's your lame sidekick? c #NiceTryCanonBoy." The FX star's hashtag was in reference to Kutcher's endorsement deal with camera company Nikon -- not Canon.

Following an epic meltdown back in 2010, Sheen was fired from the hit series that made him the highest-paid actor on TV at the time. The troubled star proceeded to publicly feud with Two and a Half Men creator, Chuck Lorre. The CBS showrunner gave an interview in 2011 that explained his decision for firing Sheen: "I was so afraid my friend was going to die," Lorre told TV Guide of his former series star. "When we would shoot a show on a Friday night, there was always that 'I'll see you Monday. I hope.'"